freight vendor issue?

Gurus,

i m creating PO for 100 pieces at 100 INR to main vendor and for fright, i m entering 1% in FRA1 condition type to another vendor.

After this, doing GR.

But at time of IR, how will i proceed so that the amount will be distributed to main vendor, freight vendor?

In MIRO, i m using "Good/Services Irems" option..still, it's not getting distributed properly.

pls help..